Papers by Krunoslav Zubrinic
Since the end of the last century, technological advancements have changed the face of the world.... more Since the end of the last century, technological advancements have changed the face of the world. Internet has had an impact on every part of society, and has changed it from its roots. The next step in the technological evolution is mobility, creating a huge leap in possibilities, but also in demands. People demand more for their money in every aspect of their lives. The same trend is also visible in tourist and travel industry. Customers demand more personalized content and are not afraid to protest if they do not get what they want. Mobile applications could hold the answer to this problem. This paper discusses the potential use of currently available technology and concepts used in developing mobile applications and their impact on different potential customer groups in the field of tourism and traveling.
Governments and organizations increasingly recognize huge opportunities in sharing and distributi... more Governments and organizations increasingly recognize huge opportunities in sharing and distribution of collected data, and research community must provide methods and algorithms for privacy preserving data publishing. Without access to the original microdata it is impossible to estimate the quality of developed anonymization methods or to compare the classification accuracy and the computational time of various algorithms applied both on anonymized and original datasets. We propose another high-quality microdata source for testing purposes - partially synthetic dataset generated on the basis of actual public use anonymized microdata set. The original distribution of the data should be simulated in a significant extent, as well as attribute value correlations or functional dependencies. Since the synthesized data are based on published microdata sets, it is expected that hidden complex patterns within a dataset can be also preserved
Concept map is a graphic tool which describes a logical structure of knowledge in the form of con... more Concept map is a graphic tool which describes a logical structure of knowledge in the form of connected concepts. Many persons create and use concept maps as planning, knowledge representation or evaluation tool, and store them in a public repository. In such environment contents and quality of these maps vary. When user wants to use specific map, they have to know to which domain that map belongs. Many creators do not pay enough attention to complete and accurate labeling of their documents. Manually categorization of maps in large repository is almost impossible as it is a very long and demanding procedure. In such environment automatic classification of concept maps according to their content can help users to identify the relevant map. There are very few researches on automatic classifcation of concept maps. In this paper we propose method for automatic categorization of concept maps using simple bag of words. In our experiment, data for classification are taken from a set of pu...
Concept map is a graphic organizer that depicts relationships among concepts. They are used for o... more Concept map is a graphic organizer that depicts relationships among concepts. They are used for organizing and representing information in different areas. In environments where many persons or applications create concept maps, contents and quality of these maps vary. When user wants to find specific information, they have to know to which domain that map belongs. As manual categorization can be a long and demanding procedure, automatic classification of concept maps can help users to identify the relevant map. In this paper we explore the possibility of automatic classification of concept maps using the simple bag of words model. We evaluate performance of two naıve Bayes classifiers against SVM.
Human resources management system for Higher Education institutions
ABSTRACT In an environment where employees and their experience are of central value to the compa... more ABSTRACT In an environment where employees and their experience are of central value to the company, human resources management (HRM) represents a significant aspect of business efficiency. In this paper we present a model of an HRM information system for universities. Special attention is paid to aspects of the system that support processes specific to science and higher education. UML was used for modelling the global and detailed system architecture and database model. FURPS+ methodology was used for classification of requirements and the MoSCoW method for analysis of requirement priority.
This article examines the possibility of publication of students' data, such as secondary school ... more This article examines the possibility of publication of students' data, such as secondary school success, state graduation exam scores and success during their first year of university study for analyses. In order to discover data patterns and relationships using data mining techniques, the data must be released in the form of original tuples, instead of pre-aggregated statistics. These records contain sensitive and even confidential personal information, which implies significant privacy concerns regarding the disclosure of such data. Removing explicit identifiers prior to data release cannot guarantee anonymity, since the datasets still contain information that can be used for linking the released records with publicly available collections that include students' identities. One of the privacy preserving techniques proposed in the literature is the k-anonymization. The process of anonymizing a data set usually involves generalizing data records and, consequently, it incurs loss of relevant information. In the primary research undertaken in the University of Dubrovnik's students' database the effect of anonymization has been measured by comparing the results of mining the original data set with the results of mining the altered data set to determine if it is possible to use anonymized data for research purposes.
Intelligence (BI) technologies are mostly based on complex and longrunning queries. It is very im... more Intelligence (BI) technologies are mostly based on complex and longrunning queries. It is very important for users to have information about query execution progress. Percent-done progress indicators are a technique that graphically shows query execution time (total and remaining) or degree of completion. In this paper we propose a method that constructs model of a percent-done progress indicators based on adaptive approach. During the learning phase, the method analyzes the influence of averaged system state on the SQL query response time using data mining algorithms. The results of this phase are models representing query behavior under dynamic server workload. Built models are used during the production phase for the estimation of query execution time. Experimental evaluation confirms the effectiveness of created models.
Adaptive progress indicator for long running SQL queries
… of the 8th conference on Applied …, 2008
Haya Shida, Subscribe (Full Service), Register (Limited Service, Free), Login. Search: The ACM Di... more Haya Shida, Subscribe (Full Service), Register (Limited Service, Free), Login. Search: The ACM Digital Library The Guide. ...
International Journal of Computers, 2011
Today, in a time of economic crisis, companies in all economic sectors should reevaluate their st... more Today, in a time of economic crisis, companies in all economic sectors should reevaluate their strategies to achieve the necessary market success. Recent studies show that the potential customers would rather spend their earnings on domestic equipment and electronic devices like laptops and mobile phones, than on vacations and traveling. This behavior generates huge losses for the travel industry and tourism. The potential solution for that problem is to connect the mobile industry with the travel and tourism in a way that will encourage customers to travel more and enjoy the time by using interactive and helpful content. In this paper we discuss the possibility of mobile device integration in the travel and tourism industry and its impact on potential customer groups. At the end of paper, a conceptual model of mobile services integration in the current travel and tourism industry is presented.
International Journal of Emerging Technologies in Learning, 2008
Today, the lifelong learning has become a necessity in most professions, especially in computer s... more Today, the lifelong learning has become a necessity in most professions, especially in computer science where people are constrained to follow fast developments. This learning is predominantly informal, based on selfstudying. Internet has turned into the most important source of all kind of information. Many Web sites provide tools and services for exchange of knowledge between people sharing a common concern, and that has a significant influence on self-studying. Personal learning environment provides an opportunity for the user to create and manage his or her environment for learning and knowledge exchange. This article describes a model of personal learning environment based on available free Web services.
Expert Systems with Applications, Nov 2012
A concept map is a graphical tool for representing knowledge. They have been used in many differe... more A concept map is a graphical tool for representing knowledge. They have been used in many different areas, including education, knowledge management, business and intelligence. Manually constructing concept maps can be a complex task; the unskilled person may encounter difficulties in determining and positioning concepts relevant to the problem area. An application that recommends concept candidates and their position in a concept map can significantly help the user in that situation. This paper gives an overview of different approaches to automatic and semiautomatic creation of concept maps from textual and non-textual sources. The concept map mining process is defined, and one method suitable for the creation of concept maps from unstructured textual sources in highly inflected languages such as the Croatian language is described in detail. Proposed method uses statistical and data mining techniques enriched with linguistic tools. With minor adjustments, that method can also be used for concept map mining from textual sources in other morphologically rich languages.
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Papers by Krunoslav Zubrinic